Grand Seikoのインスタグラム(grandseikoofficial) - 12月1日 17時24分

It takes experience to become an expert in Zaratsu polishing.
As they press the side of each case against the rotating disc, the craftsmen and women entrusted with Zaratsu polishing have only their eyes and their fingers to sense the exact angle and pressure required. Through their fingertips, they can feel the heat generated, the vibration and the rate at which abrasive is being used up and then make the adjustments to the pressure and angle that secure a perfect, distortion-free result. The skill required is the result of years of training, patience and, most of all, experience.
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